Letterboxing, like any outdoors activity, carries risks. Poison ivy, sumac and oak may obscure a letterbox hiding place; snakes or spiders may live in the same nooks and crannies where letterboxes are hidden; mosquitos, deerflies or black flies may harass you in the woods, and trails may be dangerously steep or rocky -- just to name a few common hazards. Be familiar with the LBNA Waiver of Responsibility and Disclaimer before you embark on any letterbox quest.